I would still like to know what the beagle's name was. Assuming the canine life expectancy in the 22nd-23rd century is ~20 years, we have to think Jon was on his fifth or sixth, which would mean he ran out of Musketeers.

Maybe he started adding numbers. Porthos VI

With colons. Porthos VI: The Son of Rover.

Then, he rebooted the genetic line and called the first new puppy born in that line just, "Porthos." But, a lot of people said the dog looked nothing like the original to them.

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Whenever you find yourself on the side of the majority, it is time to pause and reflect. -- Mark Twain